Clint Eastwood's Flags of Our Fathers does a most difficult and brave thing and does it brilliantly. It is a movie about a concept. Not just any concept but the shop-worn and often wrong-headed idea of "heroism."

The trouble is, he's preaching to the choir -- or, at least, to a culture, profoundly influenced by Tom Brokaw's "The Greatest Generation" and Steven Spielberg's "Saving Private Ryan," that has already absorbed the lesson that ''the Good War,'' while it may have been noble, was never less than hell.

The cheap perfume of sentimentality wafts through the closing moments of Flags of Our Fathers. It's all the more noticeable for having been avoided so well and so long. Mr. Eastwood knows that sort of thing doesn't mix with the stench of war.

Parents need to know that this harrowing World War II drama isn't for kids. The battlefield violence is graphic, with weapons ranging from tanks and grenades (explosions, flying bodies) to bayonets and knives (close-up assaults, with bloody, ravaged effects visible). The film opens with a battlefield-set nightmare, then cuts frequently between the present and flashbacks to the brutal fighting and the tour, so it's not always clear when the violence will be cropping up. Characters use frequent profanity (mostly "f--k"), smoke cigarettes in nearly every scene (except in the heat of battle), and drink plenty of alcohol, with one man in particular becoming drunk as he grieves his dead comrades and feels guilty for surviving. There's a brief reference to masturbation.

Families can talk about the legacy of World War II, often thought of as the "good war." What gets left out of the equation (pain, violence, other devastating experiences) when people look back and focus on the heroism of war? Is there such a thing as the "true" version of history? Also, how do the men who go on the fund-raising tour realize that they're being treated as commercial products? How do they suffer as a consequence? How does the movie question the notion of "heroism" as it's used to promote war?

The good stuff

Messages: The administration exploits the young flag-raisers to sell war bonds; there's racism directed toward a Native American Marine; heroes argue, drink, and fight; criticism of the artifice of the fund-raising tour; lying to mothers of dead Marines.

What to watch for

Violence: Repeated, harrowing violence (mostly related to war): explosions, gunfire, bayoneting, stabbing; weapons include flamethrowers, cannons, automatic weapons, tanks, swords, grenades, missiles; are bodies thrown and exploded; grisly images include a head dropping on one soldier, heroes stabbing enemies, Japanese suicides by grenades, burning bodies, a tank rolling over a body, and Marines killed by "friendly fire" from a Navy ship; a body is discovered in a corral by kids (the body is viewed from above, at a distance).

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